<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <title>title</title>
    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    <script type="text/javascript" src="index.js"></script>
</head>

<body>
    <div>
        <textarea class="text" rows="10"></textarea>
        <button onclick="base64_encrypt()">加密</button>
        <button onclick="base64_decrypt()">解密</button>
        <button onclick="base64_decrypt()">复制</button>
    </div>
</body>

</html>